\chapter{Future Prospects}
Reviewing the results and bringing the objective of this work in the context, \textit{loosely coupled, range-free LBSs} have potential. The FDP concept is conceivable for LBSs with low accuracy requirements. Analysing the concept, one big advantage is that such a hybrid MPC incorporates any recorded PLMN, and provides positioning on a higher level than today's LBS architectures. \citet{IbachHorbank2004} state, that loosely coupled, open architectures play an important role in value chains due to improved possibilities of interoperability, integration, composition, flexibility, reusability and thus increased efficiency at reduced total cost of operation.

From the perspective of mobile users the environment is always changing. The trend towards \textit{Seamless Computing} grows stronger, and requires on-the-fly switchovers to alternative position sensing services. This trend requires frameworks on a higher level to use current technologies such as GPS, GSM, UMTS, BT, RFID etc. together, and such loosely approaches contribute a small part to support this idea.

Anyway, the discussion sections of the last chapters reveal limitations and improvement proposals of the FDP process. Particularly the efforts of fetching cell information has to be kept in mind when deploying LBSs based on this approach. Extending coverage, and having consistent cell information is a comprehensive goal, but on the other side also an illusion because LT providers cannot pass every street, way, etc. in order to achieve this. One proposal of solving this problem would be the use of \textit{artificial intelligence}, if the data consistency regarding cell information were insufficient for specific areas. In such situations LT providers can implement specific algorithms with extended \textit{heuristics} in order to better reproduce the cell structure of PLMNs. Facing the FDP approach, there is no action which tries extending, or optimising the cell structure.

\noindent
Coming back to business, airlines advertise with \textit{miles and more}. Overcoming the burden of recording cell information for provisioning of a loosely coupled, range-free hybrid MPC, LBS providers could advertise with \textit{cells and more}. The clue in this regards is to incorporate LBS users in the recording process. An easy-to-use, comfortable background-programme on mobile phones for recording and transferring cell information to the hybrid MPC 'seamlessly' leverages the data consistency of PLMNs' cell structure. Considering a different viewpoint where NOs publish their cell structure combined with specific details about BTS positions, the accuracy may not be improved crucial, but the complexity of the overall process may be decreased. Significant accuracy progresses can only be achieved when neighbour cell information are also used in the position determination process.

\citet{IbachHorbank2004} state, that flexible and open standards are the key to open the door for a prospering variety of new business ideas and services. Looking into the future, nobody knows whether further '\textit{killerapplications}' exist. Even if LBSs did not have the potential to become such an application, the integration of loosely coupled, range-free LBSs into \textit{context aware on-demand} services might have it.

\section{Summary}
This chapter discuses the purposes of open architectures in connection with the FDP concept. Ending with optimisations ideas this chapter reflects the \textit{Seamless Computing} paradigm and the requirements of loosely-coupled frameworks in order support this idea.